hello........ im trying to buy a replacement brake master cylinder 4 an ra23..... but all im able to get is a repair kit....... i can buy original from toyota but at over 600 dollars...... i do have 2 second hand ones should i just try to make one out of the two or am i able to buy a cheap alternative somewhere...... any info would be greatly appreciated...... i can be reached on butchershopbill@hotmail.com